-3u+15u+7=8u+43

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Solution for -3u+15u+7=8u+43 equation:


Simplifying
-3u + 15u + 7 = 8u + 43

Reorder the terms:
7 + -3u + 15u = 8u + 43

Combine like terms: -3u + 15u = 12u
7 + 12u = 8u + 43

Reorder the terms:
7 + 12u = 43 + 8u

Solving
7 + 12u = 43 + 8u

Solving for variable 'u'.

Move all terms containing u to the left, all other terms to the right.

Add '-8u' to each side of the equation.
7 + 12u + -8u = 43 + 8u + -8u

Combine like terms: 12u + -8u = 4u
7 + 4u = 43 + 8u + -8u

Combine like terms: 8u + -8u = 0
7 + 4u = 43 + 0
7 + 4u = 43

Add '-7' to each side of the equation.
7 + -7 + 4u = 43 + -7

Combine like terms: 7 + -7 = 0
0 + 4u = 43 + -7
4u = 43 + -7

Combine like terms: 43 + -7 = 36
4u = 36

Divide each side by '4'.
u = 9

Simplifying
u = 9

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